302 EDWARD M. KINDLE 
shown to be coextensive with the. stratigraphic break at the base 
of its western equivalents in Ohio and Indiana. It remains to 
point out the continuity of this break across a wide belt of country 
extending about 700 miles from eastern New York to the Ohio 
and Wabash rivers. The Onondaga age of certain sandy beds 
at the base of the Onondaga limestone in New York which have 
generally been referred to the Oriskany will also be indicated. 
NEW YORK 
Eastern and central New Vork.—The unconformity at the base 
of the Onondaga though widely extended seems not to have been 
universal in eastern New York. In southeastern New York there 
appears to have been no interruption between the Esopus-Schoharie 
epoch of sedimentation and that of the Onondaga limestone. The 
fine grits of the former appear, as noted by Van Ingen,* to pass 
very gradually and almost imperceptibly into the impure limestone 
beds at the base of the latter without any indication of a physical 
break. There is, too, more resemblance between the fauna of the 
Onondaga and that of the preceding fine siliceous sediments than 
could be expected if a physical break had intervened between the 
periods of their deposition. The presence in the Onondaga of 
Anoplotheca acutiplicata, which is the only common fossil in the 
Esopus of southeastern New York and adjacent parts of New Jersey, 
is significant of uninterrupted sedimentation. The failure of many 
species of the Schoharie to persist into the Onondaga would, of 
course, be inevitable even with sedimentation uninterrupted, 
because of the marked difference in the two kinds of sediments and 
corresponding differences in the conditions under which they were 
laid down. 
While in southeastern New York it appears that the Onondaga 
limestone sedimentation followed Schoharie sedimentation with- 
out interruption of marine conditions, in central and in a portion 
of eastern New York the evidence is conclusive that the Onondaga 
limestone was deposited over an extensive area which was sub- 
merged shortly before its deposition. Throughout central and 
western New York there is no trace of the 300 feet of Esopus 
t Bull. New York State Mus., No. 69, (1903), Pp. 1204. | 
